Run results for: asdasdasdasdsadasd - MeasureThat.net

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.117 Safari/537.36

Browser: Chrome 79

Operating system: Windows

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
is	2672884.8 Ops/sec
IIFE	639739904.0 Ops/sec
typeof	662446016.0 Ops/sec
void	671692416.0 Ops/sec

Tests:

is
let x; Object.is(x,undefined)
IIFE
let x; x === (function(window, undefined){ // undefined }(this))
typeof
let x; typeof(x) === 'undefined'
void
let x; x === void(0)

;